At present, the use of carbon fiber electrodes as marine sensors for marine signal exploration has received much attention. AC impedance is the crucial factor affecting the performance of sensor. Unfortunately, the AC impedance performance of carbon fiber electrodes has been underappreciated up to date. In order to fully understand the influencing factors of AC impedance, the comprehensive and systematic study was carried out in terms of reference electrode type, encapsulated shell of electrode, immersion depth of electrode, obstacles between electrodes, electrode position, initial voltage electrolyte concentration and electrolyte type. Through analog equivalent circuits, the solution impedance R₁, charge transfer impedance R₂ and diffusion impedance W₁ were found to be 1.485, 0.313 and 1.158 Ω, respectively. The smallest impedance of silver-plated carbon fiber electrodes is only 3.49 Ω at 1 Hz. Combined with different influencing factors, we can know that the modified carbon fiber electrodes performance was mainly controlled by diffusion and transfer processes. This study would contribute to the design and application of the silver-plated carbon fiber electrodes as marine electric field sensor.

目前，碳纤维电极作为用于海洋信号探测的海洋传感器的使用已受到广泛关注。交流阻抗是影响传感器性能的关键因素。不幸的是，迄今为止，碳纤维电极的交流阻抗性能并未得到充分重视。为了充分了解交流阻抗的影响因素，从参比电极的类型，电极的封装壳，电极的浸入深度，电极间的障碍，电极的位置，初始电压，电解质浓度和电解质等方面进行了全面，系统的研究。类型。通过模拟等效电路，溶液阻抗R ₁，电荷转移阻抗R ₂和扩散阻抗W ₁发现分别为1.485、0.313和1.158Ω。镀银碳纤维电极的最小阻抗在1 Hz时仅为3.49Ω。结合不同的影响因素，我们可以知道改性碳纤维电极的性能主要受扩散和转移过程的控制。这项研究将有助于镀银碳纤维电极作为海洋电场传感器的设计和应用。